Process and furnace for the steam cracking of hydrocarbons for t

Details Process and furnace for the steam cracking of hydrocarbons for t Process and furnace for the steam cracking of hydrocarbons for t

1987-06-16

1988-10-11

Pal, Asok

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Diolefin product

208106, 208132, 585614, 585615, 585648, 585649, 585650, C07C 404, C10G 900

Patent

active

047773189

ABSTRACT:
The present invention relates to a process for the preparation of olefins and diolefins by the cracking of hydrocarbons in the presence of steam, consisting in passing a mixture of hydrocarbons and steam flowing in a cracking tube disposed inside a radiation zone of a furnace. The process is characterized in that the mean dwell time of the mixture of flowing in the cracking tube between the inlet and the outlet of the radiation zone is from 300 to 1800 milliseconds, and the reaction volume is greater in the first half of the tube length than in the second one. The present invention relates also to a cracking furnace in which the ratio between the length and the mean diameter of the cracking tube is from 200 to 600, and the tube diameter decreases from the inlet to the outlet of the radiation zone.

REFERENCES:
patent: 2917564 (1959-12-01), Pollock
patent: 3306844 (1967-02-01), Briefley
patent: 4342642 (1982-08-01), Bauer et al.

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